Safety-cap for inflation-valves of pneumatic tires.



E. A. RASBRIDGE. SAFETY CAP F OR INFLATIONV'RLVES 0F PNEUMATIC TIRES.

APPLICATION FILED MAY I0. I915.

Patented NOV. 23, 1915.

EDWARD A. RASBRIDGE, 0F SGRA NTON, PENNSYLVANIA.

SAFETY-CAP FOR INFLATION-VALVES OF PNEUMATIC TIRES.

Application filed May 10, 1915. Serial No. 27,103.

To all whom it may concern.

Be it known that I, EDWARD A. RAsBRrnGE, a citizen of the United States,residing at Scranton, in the county of Lackawanna and State ofPennsylvania, have invented certain new and useful Improvements inSafety- Caps for Inflation- Valves of Pneumatic- Tires; and Ihereby-declare that the following is a full, clear, and exactdescription thereof, reference being had to' the accompanying drawings,which form part of this specification.

This invention relates to inflation valve for pneumatic tires, and moreparticularly to safety devices for closing the bore of the valve-stem ornozzle through which-the pneumatic tube is inflated or deflated, so asto prevent the escape of air in case of leakage through the'usualcheck-valve controlling the air vent.

The primary object of the invention is to provide simple, efficient andinexpensive means for effecting a perfect closure of the air vent toprevent the escape of air, together with means for unseating thecheck-valve to permit the air to escape for the purpose of deflating thepneumatic tube, and which means are not liable to become lost or mislaidin deflating. the tube.

,The invention will first be hereinafter more particularlv described,with reference to the accompanying drawings, which are to be taken as apart of this specification, and then pointed out in the claims at theend of the description.

In said drawings, Figure 1 is a vertical sectional elevation of a deviceembodying my invention, showing the reversible cap attached to effect aclosure of the air vent;

--Fig. 2 is a slmilar view showing the cap in side elevation and inreversed position from that shown in Fig. 1 for the purpose of holdingthe check-valve open for deflating the inner tube; Fig. 3 is aperspective view of the reversible cap; Fig.- 4 is a bottom plan view ofthe same; and Fig. 5 is a vertical sectional view of the device usedwithin the socket of the reversible cap for closing the letter A maydenote the valve body orstem of an ordinary inflation valve forpneumatic.

tires having an externally threaded end protruding through the rim ofthe Wheel; sald Specification of Letters Patent.

Patented Nov.'23, 1915.

cap B. The cap B has at one end an inte-' riorly threaded socketadapting it to be screwed upon the externally threaded port1on a of thevalvebody or stem A, for the purpose. of closing the air vent or bore ofsaid body in which there is a valve stem C carrying at its inner end anordinary inwardly opening valve (not shown) controlling the admissionand escape of air through said bore,for the purpose of inflating ordeflating the pneumatic or inflatable tube to which the valve isattached in the ordinarv manner.v Within thesocket end of the cap Bthere is preferably a conical extension of the socket in reduced sizeadapted to recelve acorrespondingly shaped projection 03 on a valvemember D which'is seated on an annular shoulder at the base of saidsocket;

seated-against a correspondingly shaped-or latter is screwed. into thesocket of the cap,

' beveled-end of the valve stem A when the whereby the air vent throughthe valve-body or stem A is effectually closed and made perfectlyair-tight to prevent the. escape'of air in-case of leakage through the uual check valve within the stem or' inflatable tube. The other end ofthe reversible cap B is .formed with a projection (2 which is flattenedon one or both sides thereof, as at d, to provide an'air vent betweenthe flattened side or sides and the-adjacent wallpfthe tubular stem intowhich it is screwed; said projection 1Z being threaded, on oppositesides thereof, as at d, to adapt it to-be screwed into the interiorly'threaded end of the valve body 'or stem' A, for the purpose of engagingthe end of the valve stem C and unseating the valve within thevalve-body orinflatable tube.

I thus provide a very simple, eflicient and inexpensive device which.will prevent the escape of air from an inflatable tube in the event ofleakage through the usual check- 1055- valve, and at 'the same time asimple and eflicient means for unseating and opening the check-valve forthe purpose of deflatingthe pneumatic tube by simply reversing the cap,such device being also adapted to enable the autoist to relieve thepressure within ,the inflated tube when desired by simply reversin thereverse position very effectual means are provided for closing andsealing the air vent so as to prevent the escape of air should a theusual check-valve fail to perform its usual functions.

Having thus described my invention, what I claim as new. and desire tosecure by Let'- ters Patent is: r

1. In an inflation valve I for pneumatic tires, the combination with avalve body having a longitudinal bore and threaded 'exteriorly at oneend; of a safety cap having an interiorly threaded socket adapted toengage the threaded end of the valve body, a valve-member fitted in thelower end ofsaid socket, and an annular soft metal gasket surroundingthe upper end of said valvemember and adapted to be engaged by the endof the valve body and effect an air-tight an' interiorly threaded socketprovided .with. ,a reduced tapered extension in its bottom, a

valve-member having a tapered shank engaging said tapered extension, anda soft metal gasket surrounding the upper end of said valve-member andadapted to efi'ect an.

air-tight closure of the bore through the end of the valve body When thecap is screwed thereon.

In testimony that I claim the foregoing as my own, Iafiix my signaturein presence of two witnesses.

EDWARD, A. RASBRIDGE. Witnesses: I S. H. SAPous,

GEORGE RAsBRmon.

